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Citation:
　Jai Ram Saripilli,Debabrata Sen.Sloshing-Coupled Ship Motion Algorithm for Estimation of Slosh-Induced Pressures[J].Journal of Marine Science and Application,2018,(3):312-329.[doi:10.1007/s11804-018-0031-7]
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Sloshing-Coupled Ship Motion Algorithm for Estimation of Slosh-Induced Pressures

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Title:
Sloshing-Coupled Ship Motion Algorithm for Estimation of Slosh-Induced Pressures
Author(s):
Jai Ram Saripilli1; 2;  Debabrata Sen2
Affilations:
Author(s):
Jai Ram Saripilli1; 2;  Debabrata Sen2
1 Research and Innovation Centre, Indian Register of Shipping, Mumbai 400076, India;
2 Department of Ocean Engineering and Naval Architecture, Indian Institute of Technology, Kharagpur 721302, India
Keywords:
Slosh-coupled ship motions; Sloshing; Seakeeping; Transient Green’s function; Computational fluid dynamics
分类号:
-
DOI:
10.1007/s11804-018-0031-7
Abstract:
The effect of coupling between sloshing and ship motions in the evaluation of slosh-induced interior pressures is studied. The coupling between sloshing loads and ship motions is modelled through a hybrid algorithm which combines a potential flow solution based on transient Green function for the external ship hydrodynamics with a viscous flow solution based on a multiphase interface capturing volume of fluid (VOF) technique for the interior sloshing motion. The coupled algorithm accounts for full nonlinear slosh forces while the external forces on the hull are determined through a blended scheme of linear radiationdiffraction with nonlinear Froude-Krylov and restoring forces. Consideration of this level of nonlinearities in ship motions is found to have non-negligible effects on the slosh-coupled responses and slosh-induced loads. A scheme is devised to evaluate the statistical measure of the pressures through long-duration simulation studies in extreme irregular waves. It is found that coupling significantly influences the tank interior pressures, and the differences in the pressures between coupled and uncoupled cases can be as much as 100% or more. To determine the RAO over the frequency range needed for the simulation studies in irregular waves, two alternative schemes are proposed, both of which require far less computational time compared to the conventional method of finding RAO at each frequency, and the merits of these are discussed.

References:

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Memo

Memo:
Received date:2018-1-5;Accepted date:2018-6-11。
Corresponding author:Jai Ram Saripilli,jairam.saripilli@irclass.org
Last Update: 2019-03-05